Automatic feed mechanism.



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Y M. o, WHITE a o. o. DURYBA.

" AUTOMATIC FBEUMEOHANISM. APPLIOATION FILED MAY 2s. 1902,

2` SHEETS-SHEET 1.

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PATENTED AUG. f1, 1903. M. G. WHITE & o. o. DURYEA. AUTOMATIC FEED MEGHANISM.

APPLICATION FILED MAY 23, 1902. N0 MODEL. 2 SHEETS-SHEET Z.

PATENT Patented August 11,1903.

FFICE.

MORRIS C."WHITE AND OTHO C. DURYEA, OF LOS ANGELES,4 CALIFORNIA, i ASSIGNORS TO NATIONAL FREE PISVTON ENGINE COMPANY, LIMITED, OF

LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

AUTOMATIC FsoMEcHANlsM.

SPECIFICATION forming part of Letters Patent No. 736,325, dated August 1,1, 1903. Application filed May Z3, 1902. Serial No. 108,726. (No model.)

To 1/ZZ whom, it may concern: l i

Be it known that we, MORRIS C. WHITE and OTHO C.DURrEA,citizensoftheUnitedStates, residing at Los Angeles, in the county of Los Angeles and State of California, have inventf ed a new and useful Automatic Feed Mechanism, of which the followingis a specification.

Our invention relates to a feeding mechanism which is particularly adapted toautomatxo ilcay propel the operating parts of a rock- One object of our invention is to provide a feeding mechanism which is self-contained, compact, and adapted to be applied to rockdrills or other tools.

Another object is to provide a mechanism which may be used on drills having a vari` able length of stroke andv which will act automatically to feed the drill according to the zo length of stroke of the drill.

, Another object is to provide a mechanism which may be capable of adjustment to give any desired amount of feed.

Another object is to provide amechanism Vz 5 which has but few parts and which is very effective in operation.

Referring to the drawings, Figure I is a view showing the device attached to a rockdrill, only a portionY of the drill being shown.

3o Fig. II is a section through Fig. Ion the line II Il. Fig. III is an enlarged plan view of the device, a portion being broken away. Fig. AIV is an end elevation of the device. Fig. V is an elevation, partly in section, on line V V,

3 5 Fig. III. Figs. VI, VII; and VIII aredetails of construction. Fig. IX is a'sectional view of a drill, showing the automatic feed mechanism attached thereto.V

1 is the frame of a rock-drill.

2 is a projection from the frame forming a nut.

3 is a screw engaging the nut 2 and which may be provided with a crank. (Not shown.)

The screw 3 is provided with a longitudinal groove 4,

`5 is a yoke having wings 6. The yoke may be adjustably secured to the frame 1 by means of bolts 7 and 8, which take into the wings"` G. One of the bolts'B may have a thumb-nut 9. The bolts 7 and 8 pass through slots 10 in the frame 1.

11 is a reciprocating rod which moves coincidently with the tool.

12 is-an arm carried on the rod 11.

. 13 is a sleeve slidably mounted on the screw 3 and having a spline 14, which slides in the groove 4. The sleeve 13 carriesa gear 15. The sleeve is held between the arms of the yoke 5.

16 is a gear carried by a shaft 17 and in mesh with the gear 15.

18 is a ratchet mounted on the Shaft 17.

19 is an arm pivoted concentrically with the ratchet 1S to the upper end of the shaft 17. The arm 19 may have a projection 20....

`21 is a lug projecting upwardly from the yoke 5 and forms a stop against which the projection 2O may strike.

22 is a pawl pivoted to the freeend of the arm 19.

23 is a spring for holding the pawlagainst the ratchet.

24 is a spring yieldingly holding the .arm 19, with the stop 21, and serves to move the arm 19 and propel the pawl through its working stroke.

25 is a rod slidably mounted on the yoke 5 and having a curved plate 26.

27 isa spring-detent carried by the rod 25 and yieldingly engages notches 28 in the yoke 5 to hold the rod in position. The pawl 22 has a projection 29, which extends downwardly therefrom and lies in front of the plate 26.

.30 is a base, and the frame 1 may be slidably mounted thereon by means of `ways 31.

In operation when the arm 12 moves in the direction of the arrow which indicates the working stroke of the drill and comes in contact with the arm 19 the latter is rocked thereby, the spring 24 put in tension, and the pawl 22 moved over the ratchet. Vhen the arm 12 reverses its movement, the spring 24 retracts the arm 19 and pawl 22, which rotates the ratchet 18, shaft 17, gears 1,6 and 15, sleeve 13, and the screw 3, thus moving the frame forward. As the frame is moved the yoke 5 and attached parts are also moved v with it, the sleeve 14 readily sliding on the be moved along the frame.

screw 3. Should the stroke of the drill vary, the arm 12, moving coincidently with the drill, will move the pawl 22 a relative distance over the ratchet, and when the spring 24 retracts the arm 19 the ratchet 18 is moved a vdistance relative to the previous working stroke of the drill. By adjusting the yoke 5 along the frame 1 toward or away from the arm 12 the distance which the arm 19 is moved bythe arm 12A may be regulated, and therefore the amount of rotation given to the screw increased or decreased, respectively. The ratio of the amount of rotation of the screw relatively to the length of stroke of the drill may be varied, as described, without destroying the automatic variation of the feed. For instance, when the yoke has been adjusted to give a relatively long` feed when working in soft rock the arm 19 is moved over a rela-v tively large number of teeth, and yshould the drill strike .a hard seam and its length of stroke be reduced the stroke of the arm 19 is relatively reduced and the screw rotated accordingly. Should the yoke be adjusted for a short feed, the arm 19 is moved only a short distance; but should the drill strike a soft seam and lits stroke be increased the stroke of the arm 19 will be relatively increased and the screw 3 turned accordingly.

'By loosening the bolt 8 the yoke may be adjusted on the frame 1. rlhe bolts 7 may be suflciently loose to prevent the yoke from lateral movement and yet allow the yoke to The clamping of the yoke may be accomplished sufiiciently by the single bolt S. Y

`When it is desired to throw the automatic feed mechanism out of operation, the yoke may be moved out of the path of the arm 12. The screw 3 may then be rotated manually to feed the frame forward. If it is desired to turn the screw in a reverse direction and retract the frame, the pawl 22 maybe thrown out ofengagement with the ratchet by shifting the rod 25, and thereby moving the plate 26 into the position shown in dotted lines. (See Fig. VII.) The curved face of the plate 26 when in this position pushes the pawl 22 entirely free from the ratchet, as shown in Fig. v Vll. The extension 29 of the pawl rides upon the curved face of the plate 26 during the pawls movement in both directions. By retracting the rod 25 the pawl is allowed to again engage the ratchet and bring the feed into operation. y

Ve do not limit ourselves to the specific construction herein shown and described, as

it is obvious that variations may be made therein without departing from the spirit of our invention as defined in the claims.

What we claim, and desire to secure by Letters Patent of the United States, is-

1. A base, a screw thereon, a frame on said base engaging said screw, means operatively engaging said screw to'rotate the same, said means being connected to said frame, a reciprocatory part movable into engagement with said means to actuate said means and turn said screw, and a manually-operated device to throw said means out of operative condition, and means for yieldingly locking said device in two different positions.

2. A base, a screw thereon, a frame on said base engaging said screw, means operatively engaging said screw for rotating the same, said means being connected to said frame, a reciprocatory part movable into engagement with' said means to actuate said means and turn said screw, said reciprocatory part having a movement independently of said means, and a device to throw said means out of operative condition, and means for yieldingly locking said device.

3. A base, a screw thereon, a frame slidably mounted on said base engaging said screw, mechanism to turn saidscrew, said mechanism being connected to said frame and means to slide said entire mechanism along the frame and clamp it thereto, and a reciprocatory part movable into engagement with said ymechanism to actuate the same and thereby turn said screw.

at. A base, a screw thereon, a frame on said base engaging said screw, a reciprocatorypart, a yoke on said frame, a sleeve on said screw between the arms of the yoke, a spline therefor, a gear on said sleeve, means carried by the yoke for rotating said gear, a portion of said means being in the path of movement of said reciprocatory part, and means for adjusting said yoke relatively to said reciprocatory part.

5. A base, a screw thereon, a frame on said base engaging saidscrew, a reci procatorypart, a yoke mounted on said frame, a sleeve on said screw between'the arms of the yoke, a spline therefor, said sleeve being engaged by said yoke,and mechanism carried by said yoke and connected to said sleeve for rotating the sleeve and thereby said screw, a portion of said mechanism being in the path of move- IOO IIO

ment of said reciprocating part,and being opa yoke mounted on said frame,a sleeve splined on-` said screw, and engaging said yoke, a ratchet mounted on said-yoke,said ratchet being geared with said sleeve, a pawl engaging said ratchet, said pawl lying in the path of movement of said' reciprocating part, and means to adjustably clamp said yoke on said frame.

9. A base, a screw thereon, a frame on said base engaging said screw,a reciprocatory part, ayoke mounted on said frame, a sleeve splined on said screw and engaging said yoke, a ratchet on said yoke, gearing connecting said ratchet and said sleeve, an arm pivoted on said yoke, a pawlon said arm engaging said ratchet, and means to clamp said yoke in a suitable position on said frame to bring said arm in the path of movement of said reciprocating part.

10. A base, a screw thereon, a frame on said base engagingsaid screw,a reciprocatory part, a yoke mounted on said frame, a sleeve splined on said screw and engaging said yoke, a

ratchet on said yoke, gearing connecting said ratchet and said sleeve, an arm pivoted on said yoke, a pawly on said arm engaging said ratchet, means to clamp said yoke in a suitable position on said frame, and a spring connected at Vone end to said yoke, and at its other end to said arm.V

11. A base, a screw thereon, a frame on said base engaging said screw, a yoke mounted on said frame, a ratchet on said yoke, said ratchet being operatively connected with suitable means to turn said screw, a pawl engaging said ratchet, a spring connected to said pawl to move the same in one direction, and a reciprocatory part movable into connection with said pawl to move the pawl in another direction.

12. Abase, a screwthereon, a frameon said base engaging said screw, a yoke mounted on said frame, a ratchet on said yoke,`said ratchet being operatively connected with suitable means to turn saidscrew, an arm pivoted to vsaid yoke, a pawl pivoted to said arm, a stop on said yoke for said arm, a spring connected to said arm to move the same in one direction, and a reciprocatory part movable into contact with said arm to move said arm in another direction.

13. A base, a screw thereon, a frame on said base engaging said screw, a yoke mounted on lbase engaging said screw, a yoke moun-ted on said frame, a ratchet on said yoke, said ratchet being connected by bevel gearing with a sleeve splined on said screw, an arm pivoted to said yoke, a pawl carried `by said arm, a rod slidably mounted in said yoke and eX- tending through said frame, one end of said rod having a curved bearing-plate, said rod being movable to bring said plate into contact with said pawl, a spring connected to said arm to move the same in one direction, and a reciprocatory part movable into contact with said arm to move said arm in another direction.

15. A base, a screw thereon, a frame on said base engaging said screw, a yoke mounted on.

said frame, a ratchet on said yoke, said ratchet being connected by bevel-gearing with a sleeve splined on said screw, an arm pivoted to said yoke, a pawl carried by saidA arm, a

rod slidably mounted in said yoke and eX- tending through said frame, one end ot said rod carrying a curved bearing-plate, said rod being movable to bring said plateY into contact with said pawl, a spring connected to said arm to move the same in one direction, a reciprocatory part movable into contactwith said arm to move said arm in another direction, and means to yieldingly hold said rod in position.

In witness whereof we have signed our names to this specification, in the presence of two subscribing witnesses, at Los Angeles, California, this 17th day of May, 1902.

MORRIS C. WHITE. OTH() C. DURYEA. Witnesses:

G. T. HAcKLnY, F. M. TowNsEND. 

